piss bucket /n/ (pizz-buck-it ) A temporary cannister for unaware expulsion of piss when a urinal or washroom is not immediately present. (2): A bucket o' piss usually found in garages or foyers uesd only as a convient way to get rid of piss. (not to be confused with a porta-potty or outhouse)

Hey, would you please empty the piss bucket on your way out the back door?

An Australian slang, for the cell police throw you in for the night, due to being heavily intoxicated (or on the piss). Generally people get thrown in the piss bucket, when causing a disturbance or mischief when drunk

I was really pissed/drunk/intoxicated and threatened to beat up a bouncer. I caused a scene and the police came and threw me in the piss bucket (prison cell) for the night, to sober up.